#1 2016-03-30 16:37:59

Pisolino

Member

From: Italy

Registered: 2009-04-06

Posts: 64

Topological Optimization

Hi all,
i'm wondering if any progress has been made in Code Aster to manage the topological optimization. I found some interesting examples but still no particular hints about where to start.
OGACA is the most interesting http://www.code-aster.org/V2/spip.php?article314 and it is done with CA, there is also a SALOME-MECA Examples by Bracchesimo : Structure Optimization with Code_Aster but the link is now not valid so i cannot find any comm file. Any idea, help or hint is very appreciated. I know it will not be easy for me to obtain something similar but i want to try with all my efforts.

Thanks in advance.

Andrea

reiteres

Member

Registered: 2013-06-03

Posts: 560

Re: Topological Optimization

Hi!

Code_Aster is not directly used to do structural optimization but to provide the structural solver to solve the constraint equations, and compute the value of the functional to minimize.
For the actual optimization procedure, and the geometric manipulation Python+Salome are a good bet.

Maybe this example found on the Salome Homepage/Slideshare may give you a better picture:
http://www.slideshare.net/SalomePlatfor … tform.org/

I started with this book to come into the topic: https://books.google.at/books?hl=de&lr= … er&f=false

maybe it is also useful to you

Frederic.renou

Member

From: paris

Registered: 2009-02-26

Posts: 154

Website

Re: Topological Optimization

Hi

Regarding OGACA. it's now available on github

https://github.com/freddupont/ogaca

I tryed a lot of optimisation technologie, from topological with level set and xfem to local with salome

I don't have the time to work on this anymore if someone is interested please let me now I could help explainning wath I have done.

Regards

---

fred

Pisolino

Member

From: Italy

Registered: 2009-04-06

Posts: 64

Re: Topological Optimization

For anyone that is interested in topological optimization I have just finish to update the old-but-good comm file developed by Frederic regarding a SIMP 3d optimization, performed with energy or stress optimization. I tried to put enough comments to allow future improvements.

SIMP method useful links =
- http://www.cmap.polytechnique.fr/~allai … dSIMP.html
- https://books.google.it/books?id=NGmtmM … on&f=false

commfile is attached

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Attachments:
SIMP.comm, Size: 12.47 KiB, Downloads: 862

Pisolino

Member

From: Italy

Registered: 2009-04-06

Posts: 64

Re: Topological Optimization

here a brief video showing the tutorial of the commfile above

https://www.youtube.com/watch?v=3MRefLOA6rM

Ioannis

Member

Registered: 2016-04-01

Posts: 67

Re: Topological Optimization

very interesting topic! I will definitely try it in the near future.
Thank you both for the comm file.

Best,
Ioannis

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Aether Engineering
- aethereng.com -

TMK

Member

Registered: 2015-05-11

Posts: 36

Re: Topological Optimization

Hi all,

I am working now with provided SIMP-optimization tool and I would like to develop it a little bit. My goal is to:

1) Optimize only predescriped domain of my model in a such way that e.q. boundary condition regions will be not optimized

2) Multiple load cases taken into account in optimization

3) Better performance with newest CA solvers and using MPI, and field manipulation tools

So if anyone there is interested and could guide or help me, It would be great. I attach my test med and comm file( same as provided here in forum).

I have now tried to fully understand this comm-file but I still havent managed to get step 1 to work. Any hints which keywords I should modify?

Br,

TMK

TMK

Member

Registered: 2015-05-11

Posts: 36

Re: Topological Optimization

An comm-file.

-TMK

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Attachments:
SIMP_1707.comm, Size: 12.53 KiB, Downloads: 774

Pisolino

Member

From: Italy

Registered: 2009-04-06

Posts: 64

Re: Topological Optimization

Hi TMK,
Your developing idea is pretty good, i've been quite busy during the last weeks but i want to help you for sure. I can give you some support chatting via skype (easier to check for me). Send me a PM with your skype contact if you want and i'll add you. The same for everyone that want to improve this algorithm together.

Andrea

Suphanut Kongwat

Member

Registered: 2017-10-17

Posts: 4

Re: Topological Optimization

Hi, TMK and Pisolino

I'm also would like to improve your code for develop an optimization algorithm. But, I can't run your .comm file as well due to there are many error about that code. I don't know why it caused that problem. I will be appreciate if you can help me to tell about the process for run optimization problem:

    - Can I run an optimization problem in Aster directly with .med and ,comm files only?
    - Should I edit anything more before run your code? because I can't run your "SIMP.comm" as well.

Thank you very much for your help in advance,

Suphanut

Nidish

Member

Registered: 2020-06-04

Posts: 21

Re: Topological Optimization

Has there been further progress on this?

marcelo

Member

From: Brazil

Registered: 2017-06-20

Posts: 80

Re: Topological Optimization

I'm also interested in whether there has been progress...